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Aliphatic biomarker signatures of early Oligocene-early Miocene source rocks in the central Qiongdongnan Basin:Source analyses of organic matter

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Acta Oceanologica Sinica 2023年第3期42卷 1-18页

作者： Min Xu dujie hou Xiong Cheng Jun Gan Xinde Xu Gang Liang Wenjing Ding School of Energy Resources China University of GeosciencesBeijing 100083China Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Accumulation Mechanism Ministry of EducationBeijing 100083China Beijing Key Laboratory of Unconventional Natural Gas Geological Evaluation and Development Engineering Beijing 100083China Exploration and Development Resource Institute Hainan Branch of China National Offshore Oil CorporationHainan 570300China China National Offshore Oil Corporation(CNOOC)Research Institute Co. Ltd.Beijing 100028China

The geochemical signatures of fifty-four rock samples and three supplementary drill stem test(DST)oils from the Yacheng-Sanya formations in the central Qiongdongnan Basin(CQB)were analysed.Reconstruction of the early Oligocene-early Miocene(36–16 Ma)palaeovegetation and source analyses of organic matter(OM)were conducted using aliphatic biomarkers in ancient sediments and DST oils.Both the interpreted aquatic and terrigenous OM contributed to the CQB source rocks(SRs)but had varying relative proportions.The four distribution patterns derived from n-alkanes,terpanes,and steranes are representative of four OM composition models of the Yacheng-Sanya SRs,including model A,model B,model C,and model D,which were classified based on the increasing contribution from terrigenous OM relative to aquatic OM.Some terrigenous higher plantderived biomarkers,including oleanane,des-A-oleanane,C_(29)ααα20R sterane,bicadinanes,the C_(19)/(C_(19)+C_(23))tricyclic terpane ratio,and other n-alkane-derived ratios suggest that angiosperms had increased proportions in the palaeoflora from early Oligocene to early Miocene,and the bloom of terrigenous higher plants was observed during deposition of upper Lingshui Formation to lower Sanya Formation.These findings are consistent with the incremental total organic carbon and free hydrocarbons+potential hydrocarbons(S_1+S_2)in the lower Lingshuilower Sanya strata with a significant enrichment of OM in the E_3l_1-N_1s_2 shales.The maturity-and environmentsensitive aliphatic parameters of the CQB SRs and DST oils suggest that all the samples have predominantly reached their early oil-generation windows but have not exceeded the peak oil windows,except for some immature Sanya Formation shales.In addition,most of the OM in the analysed samples was characterised by mixed OM contributions under anoxic to sub-anoxic conditions.Furthermore,terrestrial-dominant SRs were interpreted to have developed mainly in the Lingshui-Sanya formations and were deposited in sub-oxic to oxic environments,compared to

关键词： aliphatic biomarkers early Oligocene-early Miocene organic matter sources palaeovegetation reconstruction Qiongdongnan Basin

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Biomarkers reveal the terrigenous organic matter enrichment in the late Oligocene-early Miocene marine shales in the Ying-Qiong Basin,South China Sea

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Acta Oceanologica Sinica 2023年第3期42卷 31-53页

作者： Wenjing Ding Youchuan Li Lan Lei Li Li Shuchun Yang Yongcai Yang dujie hou China National Offshors Oil Corporation(CNOOC)Research Institute Co. Ltd.Beijing 100028China School of Natural Sciences Macquarie UniversitySydney 2109Australia School of Energy Resources China University of GeosciencesBeijing 100083China CNOOC International Limited Beijing 100028China

The increase of total organic carbon content of the late Oligocene-early Miocene terrigenously-dominated marine shales in the shallower depth intervals was reported in the Ying-Qiong Basin,South China Sea.The organic enriched lower Sanya Formation shales(early Miocene)have biomarker characteristics of tropical/subtropical plants,with abundant high molecular weight n-alkanes,angiosperm-derived oleanane,rearranged oleananesⅠ,Ⅱ,Ⅱ,tricyclic/tetracyclic terpanes including des-A-oleanane,X,*,Y,Z,Z1 and bicadinanes W,T,T1,R.The biomarker characteristics are suggestive of larger influx of the dominant tropical/subtropical angiosperms in flora under a warming and more humid climate during depositions of the lower Sanya Formation(early Miocene)than the older Lingshui Formation(late Oligocene).The tropical/subtropical angiosperm input was thought as the prime control of terrigenous organic matter enrichment relative to the redox condition,and the coeval sea level changes and seafloor spreading in the South China Sea.Enrichment of the terrigenous organic matter in the early Miocene shales is likely in association with the coeval peak East Asian summer monsoon intensity in the South China Sea.

关键词： total organic carbon higher plant-derived biomarkers tropical/subtropical plants East Asian monsoonal climate

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Novel Tetracyclic Terpanes in Crude Oils and Source Rock Extracts in Pearl River Mouth Basin and Their Geological Significance

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Journal of Earth Science 2014年第4期25卷 713-718页

作者： Ning Ma dujie hou Hesheng Shi Shenzhen Branch of CNOOC Ltd. Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Accumulation Mechanism Ministry of Education School of Energy Resources China University of Geosciences (Beijing)

Novel tetracyclic terpanes X and Y namely C24-des-A-oleanane and C27 tetracyclic terpane were detected in crude oils and source rock extracts in Zhu 1 depression in Pearl River Mouth Basin by GC-MS analysis technology. These compounds are similar to oleanane in the structure, and their relative abundance in m/z 191 partial mass cbromatogram has a good correlation with oleanane. Here compounds X and Y are considered to be derived from the des-A degradation of oleanoid precursor. The ratio of X/（X-I-C24） and Y/（Y-I-C24） increase with the increasing inputs of terrigenous organic matter in crude oils. Wenchang Formation middle-deep lacustrine source rocks with planktonic algae organic matter inputs and oil generating from it contain low abundance of compounds X and Y, while Enping Formation coal measures source rocks with terrigenous higher plants organic matter inputs and oil generating from it usually have higher compounds X and Y. In general when two terrigenous compounds C19 tricyclic terpane and bicadinane-T are high in crude oils, there are also a corresponding high abundant compounds X and Y. Relative abundance of compounds X and Y is closely related to the source of organic matter and it can indicate the input of terrigenous organic matter.

关键词： tetracyclic terpane terrigenous input oil genetic type Pearl River Mouth Basin.

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New evidence for the origin of natural gas in Ordos Basin from hydrocarbons of oil water

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Chinese Science Bulletin 2002年第10期47卷 853-856页

作者： dujie hou Xianqing Li Youjun Tang Jianghan Petr Univ Jinzhou 434102 Peoples R China

The chief aim of the present work is to investigate the controversy origin of natural gas in the Ordos Basin by using the hydrocarbons of oil water. New evidence has been found: There is relatively high content of light hydrocarbons and low content of heavy components in the hydrocarbons fraction of oil water in the middle gas field of the Majiagou Formation, Ordovician reservoir. The hydrocarbons of oil water in Well Shan 12 and Well Shan 78 have relatively high abundance of tricyclic terpane. Tricyclic ter-pane/hopane of the two samples are 1.48 and 0.36, respectively. They also show that pregnane and hompregnane are in relatively high abundance with lower hopane/sterane ratio. Pr/Ph is less than 2.0. These characteristics reflected the source input of marine carbonate sedimentary environment. In contrast, the hydrocarbon of Well Shan 81 is lack of tricyclic terpane series and pregnane. It has a high hopane/sterane ratio and Pr/Ph is 3.27. These parameters are typical character of terrestrial organic

关键词： oil water hydrocarbons of oil water origin of natural gas Ordos Basin.

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琼东南盆地陆源海相烃源岩有机质富集机理

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石油与天然气地质 2024年第1期45卷 31-43页

作者：侯读杰吴克强尤丽张自鸣李雅君熊小峰徐敏严夏泽陈威合程熊中国地质大学(北京)能源学院北京100083 海相储层演化与油气富集机理教育部重点实验北京100083 中海石油(中国)有限公司海南分公司海南海口570312

琼东南盆地渐新统陆源海相烃源岩是深水区的一套重要烃源岩。从盆地构造格局、古气候、沉积相和三角洲规模4个方面对琼东南盆地渐新统陆源海相烃源岩的形成机理进行了分析。结果表明:盆地构造格局整体上控制了烃源岩的发育类型,断陷期... 详细信息

琼东南盆地渐新统陆源海相烃源岩是深水区的一套重要烃源岩。从盆地构造格局、古气候、沉积相和三角洲规模4个方面对琼东南盆地渐新统陆源海相烃源岩的形成机理进行了分析。结果表明:盆地构造格局整体上控制了烃源岩的发育类型,断陷期的崖城组陆源有机质主要以近岸堆积形式形成煤系烃源岩;而陵水组(E_(3)l)陆源有机质则以河流-三角洲搬运形式形成陆源海相烃源岩。崖城组三段(崖三段,E_(3)y^(3))和三亚组二段(三二段,N_(1)s^(2))沉积期陆源高等植物最繁盛;崖二段(E_(3)y^(2))-崖一段(E_(3)y^(1))和陵水组二段(陵二段,E_(3)l^(2))-陵一段(E_(3)l^(1))沉积期次之,陆源高等植物供给充足。沉积相带控制陆源有机质的差异,同时卸载的不同形成了明显差异的陆源海相烃源岩。陆源海相烃源岩有利的发育区域为三角洲前缘-内浅海以及海底扇。大规模的三角洲可以输送更高生物通量的陆源有机质,提高了烃源岩有机质丰度,从而形成海域最为重要的一类有特色的气源岩。

关键词：构造格局沉积相三角洲规模有机质丰度陆源海相烃源岩琼东南盆地

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Distribution Patterns of Pentacyclic TriterpenoidHydrocarbons in Low-Mature Source Rocksfrom Eastern China

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Acta Geologica Sinica(English Edition) 1998年第4期72卷 399-408页

作者： hou dujie ZHANG Linye Research Centre for Organic Geochemistry Jianghan Petroleum Institute Jingzhou Hubei 434102 Applied Geochemistry Section Dept. of Geosciences China University of Petroleum Changping Beijing 102200 Geochemistry Research Section Shengli Petroleum Geological Sciences Institute Shengli Petroleum Administration Bureau Dongying Shandong 257015

Four typical distribution patterns of pentacyclic triterpenoid hydrocarbons (types A-D) are distinguished in the low-mature source rocks from eastern China. Type A has a relatively high content of pentacyclic triterpenes. It exists in immature sediments and the distribution and abundance of triterpenes vary with the maturity of the sediments. An unknown C30 triterpene (UCT2) has also been detected in very shallow sediments. This compound is very unstable and disappears rapidly with the increase of depth. Type B is characterized by a relatively high amount of 17α(H), 21β(H)-30-homohopane. This kind of distribution pattern is common in coals and terrestrial sediments of low maturity. Type C has a relatively high content of diahopane and neohopane series. The analysis shows that this distribution pattern may have an indirect relationship with the input of higher plants despite its microbial source. There are C30—unconfirmed triterpane (UCT2) and a relatively high content of C35 hopane in type D. The distribution patterns of pentacyclic triterpenoids are varied under influences of biological sources, diagentic and sedimentary environments, thermal maturity etc. Therefore, they can provide useful information about the source rocks. Based on geochemical characteristics of the source rocks, the authors postulated that the type B and type C patterns are mainly related to suboxic-anoxic environments. Type D indicates the reducing to anoxic environment, in which C30-UCT3 may be related to some specific biological source in saline environments. The precursors and thermal evolution of some triterpenoid hydrocarbons are also discussed herein.

关键词： low maturity source rock pentacyclic triterpane hopane triterpene diagenetic environment

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The geochemical characteristics and origin of crude oils in the Kekeya Oilfield,Xinjiang,China

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Chinese Journal Of Geochemistry 2008年第4期27卷 420-423页

作者： TANG Youjun NAN Ling hou dujie XIAO Zhongyao Key Laboratory of Exploration Technologies for Oil and Gas Resources Department of Geochemistry Yangtze University Jingzhou 434023 China State Key Laboratory of Petroleum Resource and Prospecting China University of Petroleum Beijing 102249 China Department of Petroleum Geology China University of Geosciences Beijing 100083 China Exploration andDevelopment Research Institute ofTarim Oilfield Company Petrochina Korla 841000 China

GC/MS and GC/MS/MS techniques were employed to describe the characteristics of biomarker assem-blages in two sets of hydrocarbon source rocks,Jurassic and Permian,in southwestern Tarim,and the parameters for the classification of the two sets of hydrocarbon source rocks have been established. It is found that diahopane and C30-unknown terpane are abundant in Permian samples,the contents of diahopane in Jurassic samples are relatively low,and terpenoids have been detected in Jurassic samples but not in Permian source rock samples. Kekeya crude oils are abundant in diahopane and C30-unknown terpane. The results of fine oil-rock correlation indicated that Kekeya crude oils were derived mainly from the Permian hydrocarbon source rocks. However,a small amount of diterpenoid was detected in the crude oils,indicating that the Jurassic hydrocarbon source rocks also made a certain contribution to Kekeya crude oils.

关键词： Kekeya油田天然石油岩石化学性质

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The characteristics and sources of natural gases from Ordovician weathered crust reservoirs in the Central Gas Field in the Ordos Basin

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Chinese Journal Of Geochemistry 2008年第2期27卷 109-120页

作者： LI Xianqing HU Guoyi LI Jian hou dujie DONG Peng SONG Zhihong YANG Yunfeng State Key Laboratory of Coal Resources and Safe Mining China University of Mining and Technology Beijing 100083 China State Key Laboratory of Organic Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China Langfang Branch of PetroChina Petroleum Exploration and Development Research Institute Langfang 065007 China Energy College China University of Geosciences Beijing 100083 China School of Resource and Safety Engineering China University of Mining and Technology Beijing 100083 China

The Central Gas Field is a famous large-sized gas field in the Ordos Basin of China. However, identification of main gas sources of the Ordovician reservoirs in this gas field remains puzzling. On the basis of a lot of geochemical data and geological research on natural gases, the characteristics and sources of natural gases from Ordovician weathered crust reservoirs in the Central Gas Field in the Ordos Basin were studied. The results indicated that natural gases from Ordovician weathered crust reservoirs in the Central Gas Field in the Ordos Basin have similar chemical and isotopic compositions to highly mature and over-mature dry gases. Both coal-derived gases and oil-type gases coexist in the Central Gas Field in the Ordos Basin. The former was derived mainly from Carboniferous-Permian coal measures and the latter from Lower Paleozoic marine carbonates. It is suggested that coal-derived gases occur in the eastern part of the Central Gas Field while oil-type gases may be produced mainly in the northern, western and southern parts of the Central Gas Field in the Ordos Basin.

关键词：奥陶纪天然气盆地气源

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南海北部湾盆地乌石凹陷原油地球化学特征与油源对比

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地球科学 2023年第11期48卷 4135-4152页

作者：尹嘉魏琳侯读杰范彩伟满勇胡德胜中国地质大学能源学院北京100083 中海石油(中国)有限公司湛江分公司广东湛江524057

为了探究乌石凹陷的油气来源,对原油及烃源岩样品进行地球化学分析.研究结果表明,乌石凹陷原油可分为3类:Ⅰ类原油分布在深洼带的涠洲组和流沙港组一段储层,成熟度整体偏高,C_(19)三环萜烷、C_(24)四环萜烷、奥利烷丰度均相对较高,C_(23... 详细信息

为了探究乌石凹陷的油气来源,对原油及烃源岩样品进行地球化学分析.研究结果表明,乌石凹陷原油可分为3类:Ⅰ类原油分布在深洼带的涠洲组和流沙港组一段储层,成熟度整体偏高,C_(19)三环萜烷、C_(24)四环萜烷、奥利烷丰度均相对较高,C_(23)三环萜烷、C_(30)4-甲基甾烷丰度相对较低,体现出水生低等生物与陆源高等植物双重输入的特征.Ⅱ类和Ⅲ类原油主要分布在反转构造带和缓坡带的流沙港组二段、三段储层中,成熟度整体低于Ⅰ类原油,C_(19)三环萜烷、C_(24)四环萜烷、奥利烷丰度均较低,C_(23)三环萜烷、C_(30)4-甲基甾烷丰度相对较高,表明其母质来源以低等水生生物为主.相对Ⅱ类原油,Ⅲ类原油的Pr/Ph值更低,全油稳定碳同位素偏轻.油源对比表明,I类原油主要来源于流沙港组二上亚段烃源岩;II类及Ⅲ类原油均来自流沙港组二下亚段烃源岩.

关键词：地球化学特征生物标志化合物油源对比钻井乌石凹陷石油地质

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沉积环境和层序地层对次生孔隙发育的影响——以川中地区须家河组碎屑岩储集层为例

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石油勘探与开发 2010年第2期37卷 158-166页

作者：黄洁朱如凯侯读杰阮伟中国地质大学(北京)能源学院 Bureau of Economic Geology Jackson School of GeosciencesUniversity of Texas at Austin 中国石油勘探开发研究院 Department of Geological Sciences Jackson School of GeosciencesUniversity of Texas at Austin

从受沉积环境控制的骨架颗粒粒度、成分成熟度、结构成熟度、自生矿物的析出和溶蚀等方面出发,将成岩学与层序地层学结合,研究四川盆地川中地区须家河组储集层次生孔隙发育程度的影响因素。研究认为,沉积环境和层序地层格架对次生孔隙... 详细信息

从受沉积环境控制的骨架颗粒粒度、成分成熟度、结构成熟度、自生矿物的析出和溶蚀等方面出发,将成岩学与层序地层学结合,研究四川盆地川中地区须家河组储集层次生孔隙发育程度的影响因素。研究认为,沉积环境和层序地层格架对次生孔隙的发育有重要的影响,在水动力强、砂岩成分成熟度较高的沉积环境,次生孔隙发育,物性较好;而水动力较弱、成分成熟度低的砂岩,次生孔隙不发育,物性差;低位体系域砂体较高位体系域次生孔隙发育,特别是在三级层序界面上的砂体,次生孔隙发育,物性好。砂岩的厚度也对次生孔隙有较大的影响,厚度大的砂岩物性较好。粒度粗、成分成熟度高且处在低位体系域的厚层砂岩,次生孔隙较为发育,为研究区下一步勘探和开发的有利区带。

关键词：四川盆地次生孔隙沉积环境层序地层

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